Die-maker&#39;s square.



' I I INVEN'OH I finned? :[Badye P. J. BADGE.

DIE'MAKERS SQUARE. APPLICATION IILIID AUG. 5, 1909,

Patented Feb. 21, 1911.

W/ T/VESSES onms PEI'ERS ca, wlsumarorv. o. c.

FRANCIS JAMES BADGE, OF NEW YORK, N. Y.

DIE-MAKEBS SQUARE.

To all whom it may concern:

Be it known that I, FRANCIS J. BADGE, a subject of the King of GreatBritain, and a resident of the city of New York, borough of Brooklyn, inthe county of Kings and State of New York, have invented a new andImproved Die-Makers Square, of which the following is a full, clear, andexact description.

The invention is an improvement in squares such as'are used indetermining the clearance on dies, by which I mean the angle of thesides of the die impression, and has in view a square in which the bladecan be accurately and readily set at any angle to the stock withincertain limits. This I accomplish by providing the stock of the squarewith a pivotally-supported arm on which the blade of the square iscarried, the arm having an index finger, and the stock being furtherprovided with a member or projection arranged in a definite position onthe stock in calipering relation to the finger, whereby the finger maybe precisely adjusted with a micrometer gage.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure 1 is a front face view of a square constructed in accordance withmy invention; Fig. 2 is a rear face view of the same; Fig. 3 is a viewsimilar to Fig. 1, showing the pivotal arm and the blade of the squareshifted to relatively different positions; Fig. i is an edge view of thesquare; Fig. 5 is a central longitudinal section through the stock ofthe square; Fig. 6 is a front face view of the stock with the arm andblade removed; Fig. 7 is a face view of the arm; Fig. 8 is an edge viewof the same; Fig. 9 is a view similar to Fig. 1, illustrating a modifiedconstruction of the square; Fig. 10 is an edge view of the square shownin Fig. 9, partly in section; and Fig. 11 is a face view of a washer orplate entering into the construction of the square shown in Figs. 9 and10.

Referring more especially to the square shown in Figs. 1 to 8 inclusive,the same embodies the usual stock 15 and blade 16. The blade instead ofbeing assei'bled with the stock in the conventional way is carried on anarm 17, fulcrumed near that end adjacent to the blade on a screwSpecification of Letters Patent. Application filed August 5, 1909.Serial No. 511,318.

slot 19,

Y finger when the latter Patented Feh. 21, 1911.

into the stock, the blade passing through a groove 19 formed in theinner face of the arm transversely thereof and at the outer side of thescrew. The arm 17 extends substantially the full length of the stock,and at its opposite end is provided with an index finger 20, the lattertraversing a graduated scale on the stock, as shown. The zero of thisscale is so arranged that when the index finger registers therewith theblade 16 is exactly at right-angles to the stock. A screw 21 threadedinto the stock and passing through a slot 22 in the arm 17 adjacent tothe index finger 20 serves to bind the arm to the stock and hold theindex finger in any position of its adjustment. In order that the armwill not be moved in tightening the screw 21 a washer 23 is placed underthe head of the screw and is received in the recess surrounding theslot. The blade 16 is made slightly thicker than the depth of the sothat when the fulcrum screw 18 is tightened the blade will be clamped tothe stock and held against movement.

In order that the index finger may be accurately set in locating theblade at the desired angle to the stock, the latter is provided with apin, shoulder or other project-ion 24:, which is arranged at a knowndistance from the far side of the index is on the zero mark of thescale, this distance being indicated at a suitable point on the square,as shown in Fig.2, also the chordal-distance required to make a changeof one degree to either side of the zero mark. In practice, this changein the length of the chord between the projection 24 and index finger,will be constant in moving the index finger from one degree to the nextin View of the short portion of the arc of relatively long radius whichthe index finger traverses. This is further in sured by having theprojection and index finger rounded on their calipering faces or edges.

In using the square, the screws 18 and 21 are slightly loosened topermit of the movement of the arm 17. A micrometer gage is then placedagainst the outer side of the projection 24: and index finger and isadjusted until the reading is obtained for the angle desired. The screwsare then tightened, when the square is in readiness for use. Indetermining the angle which the blade makes with the stock, the distancebe- 18 which is threaded tween the outer edges of the projection 24:

p 2 g a 7 984,995

'and index finger is determined with the V mlorometer,

and the chordal found reduced 'to degrees. 7 f

The construction of the square shown in Figs. 8, 9 and 10, differsfromthat described in that the groove corresponding to the difference groove19 is widened to extend under the head of the screw 18, anda washer orplate 25lis introduced; also, the blade16 corresponding to the blade 16,is beveled on its inner edge and conforms to the oppositelybeveled edgeof the-plate, as clearly shown the screw, and is the threaded opemng 1nthe stock recelvmg in Fig. 10.7 The opening in the plate through whichthe screw 18 passes is countersunk to conform arranged at that side ofthe screw,'away from the blade 16, so that curately determined,

when, the screw is turned up to bind the arm to the stock it Will alsoforce the beveled edge of the washer against the blade, tending to forcethe blade against the bottom and outer edgeof the groove,thus securelyholding the blade in adjusted posii The beveled edge of the blade alsoenables the measurement of an angle to be acsince when such an edge,ispres'sed against a: die or other part it will'bear on a line only. I

Having thus described my invention, I claim as newand desire to secureby Letters Patent: a

1; The combination in a square, of a stock, an index arm, a screw onwhich the arm is fulcrumed, carried by the stock and having a taperingportion, a blade arranged betweenthe arm and stock and engaged by ashoulder of the arm, andaplate arranged to the tapering head of betweenthe arm and stock to press the blade to the shoulder of the arm underthe action of the tapering portion of the screw.

2. The combination in a square, of a stock, an index arm having a grooveon its inner face, a blade located in said groove, a plate arranged inthe groove of the arm, and a screw on which the arm is fulcrumed,threaded into the stock and having means to press the plate against theblade and bind it to the arm.

' 3. The combination in a square, of a stock,van index arm having agroove in its inner face, a blade and a plate located in the'groove,having abutting edges beveled in a direction to force the blade to thebot tom of the groove under pressure of the plate, and a screw on whichthe arm is fulcrumed, carried by the stock and having meansto force theplate toward the blade.

4. The combination in a square, of a stock having a scale, an armfulcrumed intermediate its length on one side and ad jacent to one endof the stock, a blade carried by the arm at one side of its fulcrum, thearm having an index finger cooperative with the scale at the oppositeside of its fulcrum, thefinger having a rounded side edge, and acalipering projection arranged on the stock at the opposite side of thefinger from the said edge.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

' FRANCIS JAMES BADGE.

Witnesses W. W. HOLT, PHILIP D. ROLLHAUS.

